Wrench



Siep@ w24. 1,508,033

T. E. TIEFENBACHER WRENCH mwa mmh 2'1.. 1923 al?, um'

ATTORNEYS Patented Sept. 9, 1924.

sA'rEs THOMAS B. TIEFENBACHER, 0F NEW YORK, N. Y.

WRENCH.

Application filed March 21, 1923. V*Serial No. 626,450.

To all whom t may concern:

Be it known that I, THOMAS B. TIEFEN- eaorinn, a citizen of the UnitedStates, and a resident of New York, in the county of New York and Stateof New York, have invented certain new and useful Improvements inVrenches, of which the following is a specification.

My invention relates to wrenches and more particularly to that class ofwrenches in which the movable j aw is adjusted by turning a screw or anut on a screw.

The object of the invention is the production in a wrench of the typespecied of novel means adapted to resist movement of the nut or screw asthe case may be, to prevent movement of the movable jaw after it hasbeen shifted to the desired position.

To the above ends my invention consists in the novel wrench hereinaftermore particularly described and then specified in the claims.

In the accompanying drawing:

Fig. 1 is a side elevation of an ordinary monkey wrench embodying myinvention.

Fig. 2 is a horizontal section on the line 2-2 of Fig. 1.

Fig. 3 is a side elevation of a diiferent type of wrench embodying theinvention.

Fig. t is a horizontal section on the line Ll-l of Fig. 3.

Referring to the drawing:

The handle of the wrench is indicated at 1, the body at 2, the movablejaw which is slidable on the body at 8 and the fixed jaw at et. A screw5 extends upwardly into the movable jaw 3 as ordinarily and vcarries anut 6 which is fast thereon and the rotation of which rotates the screwand causes the jaw 3 to travel upwardly or downwardly on the body 2,depending of course on the direction of rotation given the nut. The nut6 is provided with a slot or groove 7.

A spring is indicated at 8 and it is coiled within the groove or slot 7as shown with one end thereof fixed or anchored and extending within thebody 2. The spring on the nut exerts a pressure against both walls ofthe groove or slot longitudinally of the screw or in a directiontransverse to the plane of the nut and acts to retain the nut in anyadjusted position whereby accidental rotation of the nut or screw and aconsequent movement of the movable jaw will be prevented.

The modification shown in Figs. 3 and 4 shows the invention as appliedto a different type wrench in which the handle is indicated at 10, thebody at 11, the movable jaw at l2 and the fixed jaw at 13. In this casethe movable jaw is provided with a threaded shank or screw 14 whichpasses through a housing 15 which is pivoted to the body 11. A. movablenut isthreaded over the shank 14 and is mounted to turn within thehousing 15. Rotation of the nut moves the movable 'aw as is obvious. Thenut is also Grooved b or slotted as at 16 within which slot a spring 17is coiled or encircled with one end thereof fixed or extending within awall of the housing 15 and the function of which is the same as intheprevious case.

It lwill be understood that the invention is not limited in itsapplication to the specie types of wrenches; shown but may be appliedwith equal advantage to other types.

It will also be understood that when I refer to the term nut that termshall also include in the preferred form of the invention the screw onwhich the nut is fast.

What Iclaim as my invention is l. In a wrench, a fixed jaw and a movablejaw adapted to cooperate therewith7 a' nut for moving said movable jawand a spring having one end encircling said nut and the other endanchored in a fixed part of the wrench, said spring exerting pressure ofa constant nature against said nut in a direction transevrse to theplane of said nut.

2. In a wrench, a fixed jaw and a movable jaw adapted to cooperatetherewith, a nut for moving said movable jaw and having a groove thereinproviding opposed walls

